Rubbing cloth for aligning treatment

Abstract

A rubbing cloth used for rubbing to control the alignment of liquid crystal molecules. The rubbing cloth comprises; the pile portion containing fibers comprising a cellulose acetate. The fibers comprising a cellulose acetate may be textured filament yarns provided with crimps. The cellulose acetate may have an acetylation degree of 45% or more. The rubbing cloth can have properties of great alignment force, low frictional electrification, and high wear resistance together.

What is claimed is:  
     
         1 . A rubbing cloth for aligning treatment, comprising a pile portion of raised fibers; said fibers containing a cellulose acetate.  
     
     
         2 . The rubbing cloth according to  claim 1 , wherein said fibers containing a cellulose acetate are filament fibers with crimps.  
     
     
         3 . The rubbing cloth according to  claim 1 , wherein said cellulose acetate has an acetylation degree of 45% or more.  
     
     
         4 . The rubbing cloth according to  claim 3 , wherein said cellulose acetate is cellulose triacetate.  
     
     
         5 . The rubbing cloth according to  claim 3 , wherein said cellulose acetate is cellulose diacetate.  
     
     
         6 . The rubbing cloth according to  claim 2 , wherein said crimps are crimps in a spiral fashion.  
     
     
         7 . A rubbing cloth for aligning treatment, comprising a pile portion of raised fibers; said fibers containing a cellulose derivative.  
     
     
         8 . The rubbing cloth according to  claim 7 , wherein said cellulose derivative is a cellulose ester derivative represented by the following chemical formula (1):  
       
         
           
           
               
               
           
         
       
       wherein R 1 , R 2  and R 3  are each any of a saturated hydrocarbon group having 1 to 18 carbon atoms, an unsaturated hydrocarbon group having 2 to 18 carbon atoms, a cycloalkyl group having 3 to 8 carbon atoms, a fluoroalkyl group having 1 to 18 carbon atoms, a hydroxyalkyl group having 2 to 18 carbon atoms, a cyanoalkyl group having 2 to 18 carbon atoms, a carboxyalkyl group having 1 to 18 carbon atoms, an organic group having 6 to 25 carbon atoms which has an aryl group and an alkyl group simultaneously, an aryl group having 5 to 25 carbon atoms which contains a hetero atom, an organic group having 6 to 25 carbon atoms which contains a hetero atom and has an aryl group and an alkyl group simultaneously, and a cycloalkyl group having 3 to 8 carbon atoms which contains a hetero atom.  
     
     
         9 . The rubbing cloth according to  claim 7 , wherein said cellulose derivative is a cellulose ether derivative represented by the following chemical formula (2):  
       
         
           
           
               
               
           
         
       
       wherein R 4 , R 5  and R 6  are each any of a saturated hydrocarbon group having 1 to 18 carbon atoms, an unsaturated hydrocarbon group having 2 to 18 carbon atoms, a cycloalkyl group having 3 to 8 carbon atoms, a fluoroalkyl group having 1 to 18 carbon atoms, a hydroxyalkyl group having 2 to 18 carbon atoms, a cyanoalkyl group having 2 to 18 carbon atoms, a carboxyalkyl group having 1 to 18 carbon atoms, an organic group having 6 to 25 carbon atoms which has an aryl group and an alkyl group simultaneously, an aryl group having 5 to 25 carbon atoms which contains a hetero atom, an organic group having 6 to 25 carbon atoms which contains a hetero atom and has an aryl group and an alkyl group simultaneously, and a cycloalkyl group having 3 to 8 carbon atoms which contains a hetero atom.  
     
     
         10 . The rubbing cloth according to  claim 7 , wherein said cellulose derivative is a urethane derivative represented by the following chemical formula (3):  
       
         
           
           
               
               
           
         
       
       wherein R 7 , R 8  and R 9  are each any of a saturated hydrocarbon group having 1 to 18 carbon atoms, an unsaturated hydrocarbon group having 2 to 18 carbon atoms, a cycloalkyl group having 3 to 8 carbon atoms, a fluoroalkyl group having 1 to 18 carbon atoms, a hydroxyalkyl group having 2 to 18 carbon atoms, a cyanoalkyl group having 2 to 18 carbon atoms, a carboxyalkyl group having 1 to 18 carbon atoms, an organic group having 6 to 25 carbon atoms which has an aryl group and an alkyl group simultaneously, an aryl group having 5 to 25 carbon atoms which contains a hetero atom, an organic group having 6 to 25 carbon atoms which contains a hetero atom and has an aryl group and an alkyl group simultaneously, and a cycloalkyl group having 3 to 8 carbon atoms which contains a hetero atom.  
     
     
         11 . The rubbing cloth according to  claim 7 , wherein said cellulose derivative is a urethane derivative represented by the following chemical formula (4):  
       
         
           
           
               
               
           
         
       
       wherein R 7 , R 8  and R 9  are each any of a saturated hydrocarbon group having 1 to 18 carbon atoms, an unsaturated hydrocarbon group having 2 to 18 carbon atoms, a cycloalkyl group having 3 to 8 carbon atoms, a fluoroalkyl group having 1 to 18 carbon atoms, a hydroxyalkyl group having 2 to 18 carbon atoms, a cyanoalkyl group having 2 to 18 carbon atoms, a carboxyalkyl group having 1 to 18 carbon atoms, an organic group having 6 to 25 carbon atoms which has an aryl group and an alkyl group simultaneously, an aryl group having 5 to 25 carbon atoms which contains a hetero atom, an organic group having 6 to 25 carbon atoms which contains a hetero atom and has an aryl group and an alkyl group simultaneously, and a cycloalkyl group having 3 to 8 carbon atoms which contains a hetero atom.  
     
     
         12 . A method of manufacturing a rubbing cloth, comprising the steps of: 
 twisting fibers containing a cellulose acetate fiber, heating said fibers to obtain crimps, so as to fix said crimps on the fibers, and    preparing a raised cloth, using as pile yarn said fibers where said crimps are fixed.